Plaster trim form for openings in walls



DCC. 1931. T HANNAY I PLASTIEKv TRIM FORM FOR OPENINGS IN WALLS Filed July 5l, 1929 I/v VEN 7.0/7(

straight plaster surfaces adjacent the door-f UNITED STATES PATENT oFFplcE THOMAS L. HANNAY, or ROBBINSDALE, MINNESOTA PLASTER TRIM FORM FOR OPN'INGS IN WALLS Application med July 31, 1929. Serial No. 382,406. Y

This invention relates to plaster surface trim forms for use on-rough doorway, window and other frames, in wall openings, to

assure the construction of lsmooth and ways. At thepresent time, when rough doorways or window frames are set up in ka wall during the construction thereof, lathing is secured to the sides of the doorways and plaster is applied over this lathing.

vTo guide the plasterer in applying the plaster to the lathing, trim strips are secured to the rough doorway which form a guide for determining the outline of the plaster adj acentthe doorway. These trim strips are applied directlyV to the outer sides of the rough door frame and, therefore, conform to the contour of the studs used to form the door frame.` It often happens that the rough studs door frame are warped, or are forming the cracked, due

to the fact that nails are driven therein to secure the studs in place. It Vthus k.often happens that all portions of the outer edges of the trim strips do not lie in a true plane and the surface of the plaster around the'doorway is, therefore, often irregular.

It is the object of the present invention to provide a removable plastertrim form which is adjustable both as to width and as to height, to fit rough door frames,jwindow frames and other frames for wall openings,

the edges of which trim form will project outwardly from the rough frame to which it is applied, so that the said edges will all lie in a true plane to act as straight and true trim edges for determining the contour'of the plaster surface adjacent the rough frame.

To this end, the invention Vconsists-iii the novel parts and novel combinations of parts, hereinafter defined in the claims and described in the following specification, made in connection with the accompanying drawings, wherein like reference characters refer to the same or similar partsth'roughout the various views, and, in which,

Fig. 1 is a view in side elevation of a rough door frame showing the trim form of .the

present invention applied thereto;

Fig. 2 is a horizontal section taken on vthe line 2-2 of Fig.`1, as is indicated by the arrows;

Fig.` 3 is a horizontal section taken on the line 3-3 of Fig. 1, as is indicated by the arrows;

Fig. f4 is a vertical section taken on the line 4 4 of Fig. 1, as is indicated by the arrows;

Fig. 5 is a view illustrating the lower portion of one side of the form, and

"Fig G' is a. view in side elevation illustrating a type of nail that may be used.

`Referring to the drawings, a rough door frame for a wall is illustrated, consisting of the two vertical studs 7 acting as the side membersof the door frame, and the horizontal bar 20 acting as the top member thereof. 1n accordance with the present invention, two long side platesI 8 are provided which are preferably formed from sheet metal, and have side edges 8a rolled over small wires 9, to form beaded edges to strengthen the side plates. The width of the plates 8 corresponds to the desired width of the wall to be constructed between the outer surfaces of the two plaster layers at the two sides of the wall. Short transverse strips 21 are secured to the side plates 8 at spaced intervals thereon throughout their lengths, and these strips 21 are preferably formed from channel iron, to strengthen the'side plates, and nail holes are provided through the strips 21 and the side plates 8 for reception of nails such as the nails 10. Hinges 11 are secured to the upper ends of side plates 8, and secured to 'one of the hinges 11 is a top plate 12, While secured to rthe other of the hinges 11 is a top plate 13. The plates 12 and 13 are formed from sheet material and have edges 12a and 13a rolled over wires 9 to form beaded side edgesand the widths of the two top plates 12 and 13 correspond to the width of the side plates 8. Y

The two top plates 12 and 13 are of similar construction,with the exception that `the beaded edges 12a of the top plate 12, project downwardly from the main portion of the plate, while the beaded edges 13a of the top plate 13 projectupwardly from the main portion o the plate. The two plates 12 and 13 overlap eachother, and long slots 14 are provided in their overlapping portions which slots on the two plates are alined, and a pair of headed rivets project through the two slots 14 which rivets act to hold the overlapping portions of the two top plates 12 and 13 together, but which will yet permit extension of the two plates from each other, so that the two plates may overlap each other, more or less. Nail slots 22 are also provided on the overlappin portions in each of the two top plates 12 an 13, and preferably four or more of these nail slots 15 are cut in each plate 12 and 13, the respective and corresponding slots on the two plates 1.2 and 13 being in longitudinal alinement, whereby nails such as the nails 10 may be inserted through the various corresponding slots 22 on the two top plates, and yet relative longitudinal movement of the two top plates" can take place. Side extension plates 16 are provided which overlap the lower ends of the side plates 8, and these side extension plates 16 correspond in width to the side plates 8. Longitudinally alined nail slots 17 are cut in the overlapping portions in the side plates 8 and the extension plates 16, whereby nails such as the nails 10 may be placed through the slots 17 and yet longitudinal eX- tension of the extension plates 16, relative to the side plates 8, can be made.

Although various types of nails can be used for securing the various plates of the present form to a rough frame, preferably nails 10 as best illustrated in Fig. 6, are used, which nails each have a long, pointed shank portion 10a, a head 10b and a shoulder 10c spaced between the head 10b and the pointed end of the shank 10a.

In applying the present trim form to a rough frame, such as the door frame formed by the side members 7 and the top member 20, the two top plates 12 and 13 of the forni will be slid longitudinally relative to each other until the spacing between the two side plates 8 corresponds to the width of the door v' jframe. The top plate 13 will then be carried upwardly against the top member of the frame, whereupon the two top plates 12 and 13 will be secured to the top member 20 of the rough frame, by placing nails 10 through the nail slots 15, and driving the nails into the top member 20 until the shoulders 10a7 of the nails bear against the top plate 12, to firmly secure the two top plates in place. The side plates 8 may then be secured to the side members 7 of the frame, by driving nails 10 extending through the nail holes in the strips 21 and side plates into the side members 7 of the frame. If it is found that the height of the door frame is greater thanthe length of the side plates 8, the extension plates 16 may be applied beneath the lower ends of the side plates 8, and may be extended from the lower ends of the side plates sufficiently, to cover the space between the lower ends of the side plates 8 and the bottom of the door frame. Nails 10 applied through the nail slots 17 and secured to the side members 7, will be used for holding the extension plates 16 in place. yIn securing the variousl plates in place, some care must be taken that the first plates secured to the door frame, be mounted,so that the side edges of the plates project equal distances at either side of the member of the door frame, to which it is nailed. The side edges of all the plates 8, 12, 13 and 16 projecting from corresponding sides of the door frame, will all lie in a true vertical plane. Lathing 18 can now be applied to the various members of the side frames, whereupon plaster 19 can be applied to the lathing, and the side edges of the various )lates of the form rovide a true and straig t trim edge for guiding the plasterer in his work, so that smooth, plane surfaces can be given to the plaster 19, as it is applied. No mattei' whether the side members 7 or the top member 8 of the rough frame are warped or split, true and straight trim edges for the plaster will be assured.

After the plaster 19 has been applied about the door frame, the form of the present invention may be easily removed by pullingI out the nails 10, with a claw hammer engaged beneath the heads 10b of the nails. Although various types of nails can be used, the type shown is preferred, for the reason that the shoulders 100 will limit the distance that the nails can be driven, and yet the nail heads 10b can be readily engaged by a hammer to withdraw the same.

It will be seen that the form of the present invention can be adjusted to frames of various widths, and heights, and the device can be used in connection with rough frames of any type.

It will, of course, be understood that various changes may be made in the form, details, arrangement and proportions of the various parts without departing from the scope of the present invention.

What is claimed is:

1. A plaster surface trim form adapted to be removably secured to a rough frame in a wall opening, comprising a pair of side plates adapted to be removably secured to the sides of the rough frame, and a pair of top plates respectively hinged to the respective upper ends of said side plates, said top plates overlapping each other and being partially eX- tensible from each other to fit the top of rough frames of various widths, the edges of all of said plates on one side thereof being adapted to project outwardly from one side of the rough frame to which they may be secured, and the said edges all lying in a true plane.

2. The structure defined in claim 1, and extension plates overlapping the lower ends of said side plates and extensible therefrom to permit adjustment of said form to fit rough frames of Various heights.

3. A plaster surface trim form adapted to be removably secured to a rough frame in a wall opening, comprising a pair of side plates adapted to be removably secured to the sides of the rough frame, a pair of topplates respectively hinged to the respective upper ends of said side plates, said top plates overlapping each other and having alined slots therein, members projecting through said slots and holding said top plates together, but permitting extension of said plates relative to each other to t the tops of rough frames of various widths, the edges of all of said plates on one side thereof being adapted to project outwardly from one side of the rough frame to which they may be secured and the said edges all lying in a true plane.

4. The structure defined in claim 3, said top plates having a plurality of alined nail slots therein, whereby nails can be inserted in said nail slots through both of said top plates and driven into the top of a rough frame.

5. A plaster surface trim form adapted to be removably secured to a rough frame in a wall opening, comprising a pair of side plates, a pair of top plates respectively hinged to the respective upper ends of said side plates, said top plates overlapping each other and being partially extensible from each other to fit the tops of rough frames of various widths, a plurality of channel members secured to said side plates and extending crosswise thereof, said channel members and side plates having co-operating nail holes whereby nails can be inserted through said holes to be driven into the sides of rough frames to hold the side plates in place, the edges of saidside plates and top plates being adapted to project outwardly from a rough frame when secured thereto, so that the corresponding edges of all of said plates lie in true planes.

In testimony whereof I aflix my signature.

THOMAS L. HANNAY. 

